It doesn't seem like their gripe is with the changing of a character's race, as much as it is about not telling original stories and giving actual minority character's stories a spotlight.

I feel I phrased that poorly, but I think it's somewhere along the lines of, "I don't want to see [traditionally white character] as a black person, I want to see [original black character]'s story be told"

They're saying that Hollywood execs see that people want more black people in movies, but instead of writing good, interesting original black characters, they're just casting black actors in pre-existing roles and calling it a day

I'd also love to get some examples, seeing as it's apparently such a scourge. I know that it sometimes happens but I'm struggling to think of enough examples for it to actually be this big issue like these people try and make it out to be.

Personally, I think that people who cry about the "historical accuracy" of an Ancient Greek myth, and the casting of a demi-god that hatched from an egg, need to fuck off.

Nothing. But not in the every damn remake they release instead of filming original movies.